| Year | 1991 |
| Date | 05-Jul |
| Volume | 167 |
| Issue | 3,900 |
| Page | 21 |
| Category | Internal Combustion |
| Part | |
| Title | PTFE Insulated Plugs |
| Author | Imlac (And Frank Waterton) |
| Notes | Making his own miniature sparking plugs. Frank Waterton spot welds his electrodes. Frank Waterton takes up the tale |